CN108005741A - It is a kind of to improve the solidifying back of the body of taking out for thermally safe co-generation unit and adjusting method - Google Patents
It is a kind of to improve the solidifying back of the body of taking out for thermally safe co-generation unit and adjusting method Download PDFInfo
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- CN108005741A CN108005741A CN201711340472.1A CN201711340472A CN108005741A CN 108005741 A CN108005741 A CN 108005741A CN 201711340472 A CN201711340472 A CN 201711340472A CN 108005741 A CN108005741 A CN 108005741A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
- F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The solidifying back of the body of taking out is improved for thermally safe co-generation unit and adjusting method the invention discloses a kind of, it includes：No.1 cogeneration units and No. two cogeneration units, No.1 cogeneration units are provided with cooling steam system, water side of the heat supply network water supply and return system respectively with No.1 heat supply network heat exchanger and No. two heat supply network heat exchangers is connected, the steam side of No.1 heat supply network heat exchanger and No. two heat supply network heat exchangers is connected using heating steam branch pipe, connects the low-temperature circulating water system of No.1 cogeneration units and No. two cogeneration units with circulating backwater branch pipe using periodical feeding branch pipe.The present invention utilizes indirect heat exchange, while cooling steam temperature is effectively reduced, ensure that the quality of cooling steam；The initial station for also achieving two thermoelectricity units is connected in parallel, and improves the security of heat network system operation；Meanwhile during by realizing that No.1 cogeneration units back pressure operating mode is run, need to only put into operation a water circulating pump, reduce the power consumption of equipment.
Description
Technical field
The invention belongs to cogeneration of heat and power technical field, and in particular to a kind of to improve the solidifying back of the body of taking out for thermally safe cogeneration of heat and power system
System and adjusting method, are particularly suitable for low pressure (LP) cylinder not into the steam power plant of vapour.
Background technology
At present, China's policy gradually payes attention to the popularization of new energy, reduces the ratio of fired power generating unit.For thermal power plant,
The steam exhaust of steam turbine is directly discharged typically by air-cooled or water-cooling pattern, this has resulted in huge cold end loss.
Such as the capacity usage ratio of the subcritical pure condensate units of 300MW is about 38%, wherein cold end loss accounts for 45%, after extraction for heat supply
The capacity usage ratio of unit is promoted to 60%, but the condensation low temperature exhaust heat for still having 20% is discharged, this partial heat is due to product
Position is low and is difficult to directly utilize.Simultaneously as power grid is consumption new energy electric power, the requirement to coal motor group thermoelectricity flexibility is not
Disconnected to strengthen, coal motor group need to realize Ultra-low load operation, could meet the peak regulation demand of power grid, this brings to coal-fired thermal power unit
Great challenge.
The Chinese patent of Application No. 201710193938.3 discloses " steam turbine extraction condensing back pressure system and its adjusting method ",
Nothing needs to change rotor in the system, you can realizes that low pressure (LP) cylinder does not put into operation, which both can farthest increase externally
Heating load, and can realize that unit underload generates electricity with high benefit.And when low pressure (LP) cylinder is not into automotive row, into corresponding condenser
Steam amount it is seldom, at this time water circulating pump belong to ultra-low load operating, not only power consumption is big, but also also has to water circulating pump equipment
There is certain damage；Meanwhile when intermediate pressure cylinder steam discharge all external heat supplies, thermic load sharply increases, corresponding heat supply network is first at this time
Thus standing-meeting can also have some impact on the security of heating system there are design capacity deficiency.
The content of the invention
Based on the above situation, the present invention overcomes above-mentioned deficiency existing in the prior art, it is proposed that one kind design is reasonable, property
Can be reliable, it is advantageously implemented the solidifying back of the body of taking out of unit raising and supplies thermally safe co-generation unit and adjusting method.
Technical solution is used by the present invention solves the above problems：It is a kind of to improve the solidifying back of the body of taking out for thermally safe cogeneration of heat and power
System, including cogeneration units, the cogeneration units include No.1 cogeneration units and No. two cogeneration units；
It is characterized in that：
The No.1 cogeneration units include：No.1 Steam Turbine Through IP Admission, No.1 turbine low pressure cylinder, No.1 condenser, one
Number cooling tower, No.1 water circulating pump, steam cooling device and No.1 heat supply network heat exchanger, the steam discharge of the No.1 Steam Turbine Through IP Admission
Mouth is connected by No.1 communicating pipe with the air intake of No.1 turbine low pressure cylinder, and along steam flowing side on No.1 communicating pipe
Solidifying hydraulic pressure butterfly valve, the steam drain and one of the No.1 turbine low pressure cylinder are taken out to No.1 back pressure hydraulic pressure butterfly valve and No.1 is sequentially arranged with
The connection of number condenser, the low-temperature circulating water side of the No.1 condenser by No.1 recirculation return pipe and No.1 periodical feeding pipe with
No.1 cooling tower connects, and the 3rd regulating valve, No.1 recirculated water are sequentially arranged with along water flowing direction in No.1 recirculation return pipe
Pump and the 4th regulating valve, are equipped with the second regulating valve, the steam inlet and steam of cooling steam pipe go out on No.1 periodical feeding pipe
Mouth is connected with the steam drain of No.1 Steam Turbine Through IP Admission and the air intake of No.1 turbine low pressure cylinder respectively, on cooling steam pipe
The first regulating valve, pressure reducing valve, steam cooling device and the first shut-off valve are sequentially arranged with along steam flow direction, the steam is cold
But the cooling water side of device is connected with cooling water inlet pipe and cooling water outlet pipe, the steam inlet of the No.1 heat supply network heat exchanger pass through
No.1 heating extraction steam pipe is connected with the steam drain of No.1 Steam Turbine Through IP Admission, in No.1 heating extraction steam pipe and No.1 heat supply network heat exchanger
Steam inlet be respectively provided with the 5th regulating valve and the 6th regulating valve, the hydrophobic outlet of the No.1 heat supply network heat exchanger is connected with one
Number heat supply network drain pipe；
No. two cogeneration units include：No. two Steam Turbine Through IP Admissions, No. two turbine low pressure cylinders, No. two condensers, two
Number cooling tower, No. two water circulating pumps and No. two heat supply network heat exchangers, the steam drain of No. two Steam Turbine Through IP Admissions pass through No. two companies
Siphunculus is connected with the air intake of No. two turbine low pressure cylinders, and takes out solidifying hydraulic pressure butterfly valve equipped with No. two on No. two communicating pipes, described
The steam drain of No. two turbine low pressure cylinders is connected with No. two condensers, and the low-temperature circulating water side of No. two condensers passes through No. two
Recirculation return pipe and No. two periodical feeding pipes are connected with No. two cooling towers, in No. two recirculation return pipes along water flowing direction according to
Secondary that 7th regulating valve, No. two water circulating pumps and the 8th regulating valve are housed, the steam inlet of No. two heat supply network heat exchangers passes through two
Number heating extraction steam pipe is connected with the steam drain of No. two Steam Turbine Through IP Admissions, in No. two heating extraction steam pipes and No. two heat supply network heat exchangers
Steam inlet is respectively provided with the 9th regulating valve and the tenth regulating valve, and the hydrophobic outlet of No. two heat supply network heat exchangers is connected with No. two
Heat supply network drain pipe；
The heat supply network return pipe is connected with the water side-entrance of No.1 heat supply network heat exchanger and No. two heat supply network heat exchangers, and the heat supply network supplies water
Pipe is connected with the water side outlet of No.1 heat supply network heat exchanger and No. two heat supply network heat exchangers, and the steam inlet of the 6th regulating valve passes through
Heating steam branch pipe is connected with the steam inlet of the tenth regulating valve, and the 13rd regulating valve, institute are housed on heating steam branch pipe
The circulating water outlet for stating No.1 condenser is connected by periodical feeding branch pipe with the circulating water outlet of No. two condensers, and is being circulated
12nd regulating valve is housed, the circulating water intake of the No.1 condenser is followed by circulating backwater branch pipe and No. two on water supply branch pipe
The circulating water outlet connection of ring water pump, and the 11st regulating valve is housed on circulating backwater branch pipe.
Preferably, No.1 heat supply network heat exchanger of the present invention is to be connected in parallel with No. two heat supply network heat exchangers, and one
The water side-entrance of number heat supply network heat exchanger and water side outlet are respectively provided with the 16th valve and the 17th valve, exchange heat in No. two heat supply networks
The water side-entrance of device and water side outlet are respectively provided with the 14th valve and the 15th valve.
Preferably, valve of the No.1 back pressure hydraulic pressure butterfly valve of the present invention for no mechanical position limitation, when valve is fully closed
Fluid No leakage；It is the valve for having mechanical position limitation that No.1, which takes out solidifying hydraulic pressure butterfly valve and the solidifying hydraulic pressure butterfly valve of No. two pumpings, when valve is fully closed
Fluid is still negotiable.
Preferably, steam cooling device of the present invention is dividing wall type heat exchanger, the cooling water of steam cooling device
Source can come from condensation water, low-temperature circulating water and the boiler replenishing water of cogeneration units, can be from the softened water of power plant, removes
Brine or tap water.
Preferably, the first regulating valve of the present invention, the second regulating valve, the 3rd regulating valve, the 4th regulating valve, the 5th
Regulating valve, the 6th regulating valve, the 7th regulating valve, the 8th regulating valve, the 9th regulating valve, the tenth regulating valve, the 11st regulating valve,
12 regulating valves, the 13rd regulating valve, the 14th regulating valve, the 15th regulating valve, the 16th regulating valve and the 17th regulating valve
It is respectively provided with the function of cut-off and adjusting.
A kind of as described above improve coagulates adjusting method of the pumping back of the body for thermally safe co-generation unit, it is characterised in that
Adjusting method is as follows：
When No.1 cogeneration units and No. two cogeneration units are supplying thermal condition：
In No. two cogeneration units, open and adjust No. two and take out and coagulate hydraulic pressure butterfly valve, the 9th regulating valve and the tenth regulating valve, two
A part of steam discharge of number Steam Turbine Through IP Admission continues to do work into No. two turbine low pressure cylinders, No. two Steam Turbine Through IP Admissions it is another
Part steam discharge enters No. two heat supply network heat exchangers and heats the hot net water from heat supply network return pipe；At this time, the 7th regulating valve and the are opened
Low-temperature circulating water from No. two cooling towers, is delivered to by eight regulating valves using No. two water circulating pumps by No. two recirculation return pipes
No. two condensers, the low-temperature circulating water after being heated are delivered to No. two cooling towers by No. two periodical feeding pipes again；
In No.1 cogeneration units, close the first regulating valve and the first shut-off valve, cooling steam pipe are in off state, cool down
Vapour system does not put into operation；At this time, standard-sized sheet No.1 back pressure hydraulic pressure butterfly valve, opens and adjusts No.1 and take out solidifying hydraulic pressure butterfly valve, the 5th
Regulating valve and the 6th regulating valve, a part of steam discharge of No.1 Steam Turbine Through IP Admission continue to do work into No.1 turbine low pressure cylinder,
Another part steam discharge of No.1 Steam Turbine Through IP Admission enters hot net water of the No.1 heat supply network heat exchanger heating from heat supply network return pipe；This
When, the second regulating valve, the 3rd regulating valve and the 4th regulating valve are opened, will by No.1 recirculation return pipe using No.1 water circulating pump
Low-temperature circulating water from No.1 cooling tower is delivered to No.1 condenser, and the low-temperature circulating water after being heated is circulated by No.1 again
Feed pipe is delivered to No.1 cooling tower；
Open and adjust the 14th regulating valve and the 16th regulating valve, the hot net water from heat supply network return pipe is at the same time into No.1 warm
Net heat exchanger and No. two heat supply network heat exchangers, open and adjust the 15th regulating valve and the 17th regulating valve, the heat supply network after being heated
After water output mixing, by the external heat supply of heat supply network feed pipe.
When No.1 cogeneration units are back pressure operating mode, No. two cogeneration units are supplying thermal condition, under back pressure operating mode
No.1 turbine low pressure cylinder not into vapour do work：
In No. two cogeneration units, open and adjust No. two and take out and coagulate hydraulic pressure butterfly valve, the 9th regulating valve and the tenth regulating valve, two
A part of steam discharge of number Steam Turbine Through IP Admission continues to do work into No. two turbine low pressure cylinders, No. two Steam Turbine Through IP Admissions it is another
Part steam discharge enters No. two heat supply network heat exchangers and heats the hot net water from heat supply network return pipe；At this time, open and adjust the 7th adjusting
Valve and the 8th regulating valve, using No. two water circulating pumps by No. two recirculation return pipes by the low-temperature circulating water from No. two cooling towers
No. two condensers are delivered to, the low-temperature circulating water after being heated is delivered to No. two cooling towers by No. two periodical feeding pipes again；
In No.1 cogeneration units, it is opening to open the first regulating valve and the first shut-off valve, cooling steam pipe, cooling
Vapour system puts into operation；At this time, contract fully No.1 back pressure hydraulic pressure butterfly valve and No.1 take out solidifying hydraulic pressure butterfly valve, open the 5th regulating valve
With the 6th regulating valve, the steam discharge of No.1 Steam Turbine Through IP Admission fully enters No.1 heat supply network heat exchanger and heats from heat supply network return pipe
Hot net water；At this time, having the No.1 Steam Turbine Through IP Admission steam discharge of one very little flow to first pass around pressure reducing valve reduces pressure, secondly passes through
Crossing steam cooling device reduces temperature, it is cooled down subsequently into No.1 turbine low pressure cylinder；At this time, second is closed to adjust
Valve, the 3rd regulating valve and the 4th regulating valve, No.1 water circulating pump and No.1 cooling tower do not put into operation；At this time, the 11st is opened
Regulating valve and the 12nd regulating valve, the part low-temperature circulating water from No. two cooling towers are also delivered to one by circulating backwater branch pipe
Number condenser, the low-temperature circulating water after being heated are delivered to No. two cooling towers by periodical feeding branch pipe again.
Open and adjust the 14th regulating valve and the 16th regulating valve, the hot net water from heat supply network return pipe is at the same time into one
Number heat supply network heat exchanger and No. two heat supply network heat exchangers, open and adjust the 15th regulating valve and the 17th regulating valve, after being heated
After hot net water output mixing, by the external heat supply of heat supply network feed pipe.
Preferably, when No.1 cogeneration units and No. two cogeneration units are supplying thermal condition：
Close the 11st regulating valve and the 12nd regulating valve, the circulation of No.1 cogeneration units and No. two cogenerations of heat and power
The circulation of unit does not connect mutually, each self-sustaining independent operating；
The 13rd regulating valve is closed, the heating steam of No.1 heat supply network heat exchanger and the heating steam of No. two heat supply network heat exchangers do not connect mutually
It is logical, each self-sustaining independent operating.
When No.1 cogeneration units are back pressure operating mode, No. two cogeneration units are supplying thermal condition：
Open the 11st regulating valve and the 12nd regulating valve, the No.1 cooling tower and No.1 water circulating pump of No.1 cogeneration units
Do not put into operation, be at the same time No.1 cogeneration units and No. two cogeneration of heat and power machines using No. two cooling towers and No. two water circulating pumps
Group provides low-temperature circulating water, by adjusting the aperture of the 8th regulating valve and the 11st regulating valve, adjusts enter No. two condensings respectively
The low-temperature circulating water of device and No.1 condenser；
At this time, all thermic load mistake occurs for external heat supply, No.1 heat supply network heat exchanger in the steam discharge of No.1 Steam Turbine Through IP Admission
Cause greatly to reduce for thermal safety, can open and adjust the 13rd regulating valve, by the part steam discharge of No.1 Steam Turbine Through IP Admission
No. two heat supply network heat exchangers are delivered to by heating steam branch pipe, using No. two heat supply network heat exchanger surplus capacities, dissolve No.1 heat supply network
The excessive thermic load of heat exchanger.
Compared with prior art, the present invention has the advantages that：（1）Present invention design is reasonable, structure letter
Single, dependable performance, the initial station for realizing two thermoelectricity units by heating steam branch pipe is connected in parallel, by circulating backwater branch pipe and
Periodical feeding branch pipe links together the circulation of two thermoelectricity units；（2）The present invention can realize that No.1 thermoelectricity joins
When producing the operation of unit back pressuce operating mode, No.1 water circulating pump need not put into operation, and the low-temperature receiver of condenser can be met using No. two cooling towers
Demand, institute's increased energy consumption when eliminating No.1 water circulating pump low load operation；（3）The present invention is by the way that two initial stations are connected to
Together so that both can mutually undertake each unnecessary heating demand, improve the security of heat network system operation.
Brief description of the drawings
Fig. 1 is that the solidifying structure diagram taken out the back of the body and supply thermally safe co-generation unit is improved in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, and following embodiments are to this hair
Bright explanation and the invention is not limited in following embodiments.
In the present embodiment, thermally safe co-generation unit, including thermoelectricity connection are supplied referring to Fig. 1, a kind of solidifying back of the body of taking out of raising
Unit is produced, the cogeneration units include No.1 cogeneration units 1 and No. two cogeneration units 2.
The No.1 cogeneration units 1 include：No.1 Steam Turbine Through IP Admission 101, No.1 turbine low pressure cylinder 102, one
Number condenser 103, No.1 cooling tower 104, No.1 water circulating pump 105, steam cooling device 106 and No.1 heat supply network heat exchanger 107,
The steam drain of the No.1 Steam Turbine Through IP Admission 101 passes through No.1 communicating pipe 110 and the air intake of No.1 turbine low pressure cylinder 102
Connection, is sequentially arranged with No.1 back pressure hydraulic pressure butterfly valve 121 along steam flow direction on the No.1 communicating pipe 110 and No.1 is taken out and coagulated
Hydraulic pressure butterfly valve 122, the steam drain of the No.1 turbine low pressure cylinder 102 are connected with No.1 condenser 103, the No.1 condenser
103 low-temperature circulating water side is connected by No.1 recirculation return pipe 114 and No.1 periodical feeding pipe 113 with No.1 cooling tower 104,
In the No.1 recirculation return pipe 114 the 3rd regulating valve 127,105 and of No.1 water circulating pump are sequentially arranged with along water flowing direction
4th regulating valve 128, is equipped with the second regulating valve 126 on the No.1 periodical feeding pipe 113, the steam of cooling steam pipe 111 into
Mouth and steam (vapor) outlet connect with the steam drain of No.1 Steam Turbine Through IP Admission 101 and the air intake of No.1 turbine low pressure cylinder 102 respectively
Connect, it is cold along steam flow direction to be sequentially arranged with the first regulating valve 123, pressure reducing valve 124, steam on the cooling steam pipe 111
But 106 and first shut-off valve 125 of device, the cooling water side of the steam cooling device 106 are connected with cooling water inlet pipe 115 and cold
But outlet pipe 116, the steam inlet of the No.1 heat supply network heat exchanger 107 pass through No.1 heating extraction steam pipe 112 and No.1 steam turbine
The steam drain connection of intermediate pressure cylinder 101, the steaming of the steam inlet and No.1 heat supply network heat exchanger 107 of the No.1 heating extraction steam pipe 112
Vapor inlet is respectively provided with the 5th regulating valve 129 and the 6th regulating valve 130, and the hydrophobic outlet of the No.1 heat supply network heat exchanger 107 connects
It is connected to No.1 heat supply network drain pipe 117.
No. two cogeneration units 2 include：201, No. two turbine low pressure cylinders 202, two of No. two Steam Turbine Through IP Admissions
Number water circulating pump 205 of cooling tower 204, two of condenser 203, two and No. two heat supply network heat exchangers 206, in No. two steam turbines
The steam drain of cylinder pressure 201 is connected by No. two communicating pipes 210 with the air intake of No. two turbine low pressure cylinders 202, No. two companies
On siphunculus 210 solidifying hydraulic pressure butterfly valve 221, the steam drain and No. two condensers of No. two turbine low pressure cylinders 202 are taken out equipped with No. two
203 connections, the low-temperature circulating water side of No. two condensers 203 passes through No. two recirculation return pipes 213 and No. two periodical feeding pipes
212 are connected with No. two cooling towers 204, and the 7th adjusting is sequentially arranged with along water flowing direction in No. two recirculation return pipes 213
222, No. two 205 and the 8th regulating valves 223 of water circulating pump of valve, the steam inlet of No. two heat supply network heat exchangers 206 pass through No. two
Heating extraction steam pipe 211 is connected with the steam drain of No. two Steam Turbine Through IP Admissions 201, No. two heating extraction steam pipes 211 and No. two heat
The steam inlet of net heat exchanger 206 is respectively provided with the 9th regulating valve 224 and the tenth regulating valve 225, No. two heat supply network heat exchangers
206 hydrophobic outlet is connected with No. two heat supply network drain pipes 214.
Heat supply network return pipe 61 is connected with the water side-entrance of No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206, heat supply network
Feed pipe 62 is connected with the water side outlet of No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206, the 6th regulating valve
130 steam inlet is connected by heating steam branch pipe 5 with the steam inlet of the tenth regulating valve 225, the heating steam branch pipe 5
Upper that 13rd regulating valve 51 is housed, the circulating water outlet of the No.1 condenser 103 passes through periodical feeding branch pipe 4 and No. two condensings
The circulating water outlet of device 203 connects, and the 12nd regulating valve 41, the No.1 condenser 103 are housed on the periodical feeding branch pipe 4
Circulating water intake be connected by circulating backwater branch pipe 3 with the circulating water outlet of No. two water circulating pumps 205, the circulating backwater branch
11st regulating valve 31 is housed on pipe 3.
In the present embodiment, first regulating valve 123, the second regulating valve 126, the 3rd regulating valve 127, the 4th regulating valve
128th, the 5th regulating valve 129, the 6th regulating valve 130, the 7th regulating valve 222, the 8th regulating valve 223, the 9th regulating valve 224,
Ten regulating valves 225, the 11st regulating valve 31, the 12nd regulating valve 41, the 13rd regulating valve 51, the 14th regulating valve the 63, the tenth
Five regulating valves 64, the 16th regulating valve 65 and the 17th regulating valve 66 are respectively provided with cut-off and regulatory function.
In the present embodiment, the No.1 back pressure hydraulic pressure butterfly valve 121 is the valve of no mechanical position limitation, is flowed when valve is fully closed
Body No leakage, that is, when No.1 back pressure hydraulic pressure butterfly valve 121 is fully closed, the steam discharge of No.1 Steam Turbine Through IP Admission 101 can not pass through one
Number communicating pipe 110 enters No.1 turbine low pressure cylinder 102；No.1 takes out solidifying hydraulic pressure butterfly valve 122 and the solidifying hydraulic pressure butterfly valve 221 of No. two pumpings is equal
To there is the valve of mechanical position limitation, when valve is fully closed, fluid is still negotiable, that is, No. two take out solidifying hydraulic pressure butterfly valve 221 it is fully closed when,
The steam discharge of also a small amount of No. two Steam Turbine Through IP Admissions 201 can enter No. two turbine low pressure cylinders 202 by No. two communicating pipes 210.
In the present embodiment, steam cooling device 106 is dividing wall type heat exchanger, by way of indirect heat exchange, to cooling
Steam cools down, and the cooling water source of wherein steam cooling device 106 can come from the condensation water of cogeneration units, low temperature follows
Ring water or boiler replenishing water or softened water, demineralized water or tap water from power plant.
In the present embodiment, specific adjusting method is as follows：
When No.1 cogeneration units 1 and No. two cogeneration units 2 are supplying thermal condition：
In No. two cogeneration units 2, open and adjust No. two and take out solidifying hydraulic pressure butterfly valve 221, the 9th regulating valve 224 and the tenth tune
Valve 225 is saved, a part of steam discharge of No. two Steam Turbine Through IP Admissions 201 continues to do work into No. two turbine low pressure cylinders 202, institute
Another part steam discharge for stating No. two Steam Turbine Through IP Admissions 201 comes from heat supply network return pipe 61 into No. two heating of heat supply network heat exchangers 206
Hot net water；At this time, the 7th regulating valve 222 and the 8th regulating valve 223 are opened, passes through two using No. two water circulating pumps 205
Low-temperature circulating water from No. two cooling towers 204 is delivered to No. two condensers 203 by number recirculation return pipe 213, after being heated
Low-temperature circulating water is delivered to No. two cooling towers 204 by No. two periodical feeding pipes 212 again；
In No.1 cogeneration units 1, the first regulating valve 123 and the first shut-off valve 125 are closed, cooling steam pipe 111 is pass
Closed state, cooling steam system do not put into operation；At this time, standard-sized sheet No.1 back pressure hydraulic pressure butterfly valve 121, opens and adjusts No.1 and take out and coagulate
Hydraulic pressure butterfly valve 122, the 5th regulating valve 129 and the 6th regulating valve 130, a part of steam discharge of the No.1 Steam Turbine Through IP Admission 101
Continue to do work into No.1 turbine low pressure cylinder 102, another part steam discharge of the No.1 Steam Turbine Through IP Admission 101 enters No.1
Heat supply network heat exchanger 107 heats the hot net water from heat supply network return pipe 61；At this time, the second regulating valve 126, the 3rd regulating valve are opened
127 and the 4th regulating valve 128, No.1 cooling tower will be come from by No.1 recirculation return pipe 114 using No.1 water circulating pump 105
104 low-temperature circulating water is delivered to No.1 condenser 103, and the low-temperature circulating water after being heated passes through No.1 periodical feeding pipe again
113 are delivered to No.1 cooling tower 104；
Open and adjust the 14th regulating valve 63 and the 16th regulating valve 65, the hot net water from heat supply network return pipe 61 enters at the same time
No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206, open and adjust the 15th regulating valve 64 and the 17th regulating valve
66, after the hot net water output mixing after being heated, by the 62 external heat supply of heat supply network feed pipe.
When No.1 cogeneration units 1 are back pressure operating mode, No. two cogeneration units 2 are supplying thermal condition：
In No. two cogeneration units 2, open and adjust No. two and take out solidifying hydraulic pressure butterfly valve 221, the 9th regulating valve 224 and the tenth tune
Valve 225 is saved, a part of steam discharge of No. two Steam Turbine Through IP Admissions 201 continues to do work into No. two turbine low pressure cylinders 202, institute
Another part steam discharge for stating No. two Steam Turbine Through IP Admissions 201 comes from heat supply network return pipe 61 into No. two heating of heat supply network heat exchangers 206
Hot net water；At this time, open and adjust the 7th regulating valve 222 and the 8th regulating valve 223, passed through using No. two water circulating pumps 205
Low-temperature circulating water from No. two cooling towers 204 is delivered to No. two condensers 203 by No. two recirculation return pipes 213, after being heated
Low-temperature circulating water be delivered to No. two cooling towers 204 by No. two periodical feeding pipes 212 again；
In No.1 cogeneration units 1, the first regulating valve 123 and the first shut-off valve 125 are opened, cooling steam pipe 111 is to open
State is opened, cooling steam system puts into operation；At this time, contract fully No.1 back pressure hydraulic pressure butterfly valve 121 and No.1 take out solidifying hydraulic pressure butterfly valve
122, the 5th regulating valve 129 and the 6th regulating valve 130 are opened, the steam discharge of No.1 Steam Turbine Through IP Admission 101 fully enters No.1 heat
Net heat exchanger 107 heats the hot net water from heat supply network return pipe 61；At this time, there is the No.1 Steam Turbine Through IP Admission of one small flow
101 steam discharge, which first passes around pressure reducing valve 124, reduces pressure, secondly temperature is reduced by steam cooling device 106, subsequently into one
Number turbine low pressure cylinder 102 is cooled down；At this time, the second regulating valve 126, the 3rd regulating valve 127 and the 4th regulating valve are closed
128, No.1 water circulating pump 105 and No.1 cooling tower 104 do not put into operation；At this time, the 11st regulating valve 31 and the 12nd is opened
Regulating valve 41, the part low-temperature circulating water from No. two cooling towers 204 are delivered to No.1 condenser by circulating backwater branch pipe 3
103, the low-temperature circulating water after being heated is delivered to No. two cooling towers 204 by periodical feeding branch pipe 4 again；
Open and adjust the 14th regulating valve 63 and the 16th regulating valve 65, the hot net water from heat supply network return pipe 61 enters at the same time
No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206, open and adjust the 15th regulating valve 64 and the 17th regulating valve
66, after the hot net water output mixing after being heated, by the 62 external heat supply of heat supply network feed pipe.
For the adjusting method in the present embodiment, following purpose can also be realized：
When No.1 cogeneration units 1 and No. two cogeneration units 2 are supplying thermal condition：
Close the 11st regulating valve 31 and the 12nd regulating valve 41, the circulation of No.1 cogeneration units 1 and No. two heat
The circulation of Electricity Federation production unit 2 does not connect mutually, each self-sustaining independent operating；
The 13rd regulating valve 51 is closed, the heating of the heating steam of No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206 is steamed
Vapour does not connect mutually, each self-sustaining independent operating.
When No.1 cogeneration units 1 are back pressure operating mode, No. two cogeneration units 2 are supplying thermal condition：
Open the 11st regulating valve 31 and the 12nd regulating valve 41, the No.1 cooling tower 104 and No.1 of No.1 cogeneration units 1
Water circulating pump 105 does not put into operation, is at the same time No.1 cogeneration of heat and power machine using No. two cooling towers 204 and No. two water circulating pumps 205
Group 1 and No. two cogeneration units 2 provide low-temperature circulating waters, by adjusting the 8th regulating valve 223 and the 11st regulating valve 31
Aperture, adjusts the low-temperature circulating water into No. two condensers 203 and No.1 condenser 103 respectively；
At this time, all heat occurs for external heat supply, No.1 heat supply network heat exchanger 107 in the steam discharge of No.1 Steam Turbine Through IP Admission 101
Reduced caused by load is excessive for thermal safety, can open and adjust the 13rd regulating valve 51, by No.1 Steam Turbine Through IP Admission
101 part steam discharge is delivered to No. two heat supply network heat exchangers 206 by heating steam branch pipe 5, rich using No. two heat supply network heat exchangers 206
Abundant capacity, the excessive thermic load of consumption No.1 heat supply network heat exchanger 107.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, be named
Title etc. can be different, and the above content described in this specification is only to structure example explanation of the present invention.It is all according to
The equivalence changes or simple change done according to the construction described in inventional idea of the present invention, feature and principle, are included in this hair
In the protection domain of bright patent.Those skilled in the art can do described specific embodiment various
The modification of various kinds or supplement substitute in a similar way, without departing from structure of the invention or surmount present claims
Scope defined in book, is within the scope of protection of the invention.
Claims (7)
1. a kind of improve the solidifying back of the body of taking out for thermally safe co-generation unit, including cogeneration units, the cogeneration units
Including No.1 cogeneration units（1）With No. two cogeneration units（2）；It is characterized in that：
The No.1 cogeneration units（1）Including：No.1 Steam Turbine Through IP Admission（101）, No.1 turbine low pressure cylinder（102）、
No.1 condenser（103）, No.1 cooling tower（104）, No.1 water circulating pump（105）, steam cooling device（106）With No.1 heat supply network
Heat exchanger（107）, the No.1 Steam Turbine Through IP Admission（101）Steam drain pass through No.1 communicating pipe（110）With No.1 steam turbine
Low pressure (LP) cylinder（102）Air intake connection, the No.1 communicating pipe（110）On along steam flow direction be sequentially arranged with No.1 back pressure
Hydraulic pressure butterfly valve（121）Solidifying hydraulic pressure butterfly valve is taken out with No.1（122）, the No.1 turbine low pressure cylinder（102）Steam drain and No.1
Condenser（103）Connection, the No.1 condenser（103）Low-temperature circulating water side pass through No.1 recirculation return pipe（114）With one
Number periodical feeding pipe（113）With No.1 cooling tower（104）Connection, the No.1 recirculation return pipe（114）On along water flowing side
To being sequentially arranged with the 3rd regulating valve（127）, No.1 water circulating pump（105）With the 4th regulating valve（128）, the No.1 periodical feeding
Pipe（113）It is upper that second regulating valve is housed（126）, cooling steam pipe（111）Steam inlet and steam (vapor) outlet respectively with No.1 vapour
Turbine intermediate pressure cylinder（101）Steam drain and No.1 turbine low pressure cylinder（102）Air intake connection, the cooling steam pipe
（111）On along steam flow direction be sequentially arranged with the first regulating valve（123）, pressure reducing valve（124）, steam cooling device（106）
With the first shut-off valve（125）, the steam cooling device（106）Cooling water side be connected with cooling water inlet pipe（115）And cooling
Outlet pipe（116）, the No.1 heat supply network heat exchanger（107）Steam inlet pass through No.1 heating extraction steam pipe（112）With No.1 vapour
Turbine intermediate pressure cylinder（101）Steam drain connection, the No.1 heating extraction steam pipe（112）Steam inlet and No.1 heat supply network heat exchanger
（107）Steam inlet be respectively provided with the 5th regulating valve（129）With the 6th regulating valve（130）, the No.1 heat supply network heat exchanger
（107）Hydrophobic outlet be connected with No.1 heat supply network drain pipe（117）；
No. two cogeneration units（2）Including：No. two Steam Turbine Through IP Admissions（201）, No. two turbine low pressure cylinders（202）、
No. two condensers（203）, No. two cooling towers（204）, No. two water circulating pumps（205）With No. two heat supply network heat exchangers（206）, described two
Number Steam Turbine Through IP Admission（201）Steam drain pass through No. two communicating pipes（210）With No. two turbine low pressure cylinders（202）Air intake
Connection, No. two communicating pipes（210）It is upper to take out solidifying hydraulic pressure butterfly valve equipped with No. two（221）, No. two turbine low pressure cylinders（202）
Steam drain and No. two condensers（203）Connection, No. two condensers（203）Low-temperature circulating water side be recycled back to by No. two
Water pipe（213）With No. two periodical feeding pipes（212）With No. two cooling towers（204）Connection, No. two recirculation return pipes（213）On
The 7th regulating valve is sequentially arranged with along water flowing direction（222）, No. two water circulating pumps（205）With the 8th regulating valve（223）, it is described
No. two heat supply network heat exchangers（206）Steam inlet pass through No. two heating extraction steam pipes（211）With No. two Steam Turbine Through IP Admissions（201）'s
Steam drain connects, No. two heating extraction steam pipes（211）With No. two heat supply network heat exchangers（206）Steam inlet be respectively provided with the 9th
Regulating valve（224）With the tenth regulating valve（225）, No. two heat supply network heat exchangers（206）Hydrophobic outlet be connected with No. two heat supply networks
Drain pipe（214）；
Heat supply network return pipe（61）With No.1 heat supply network heat exchanger（107）With No. two heat supply network heat exchangers（206）Water side-entrance connection, heat
Net feed pipe（62）With No.1 heat supply network heat exchanger（107）With No. two heat supply network heat exchangers（206）Water side outlet connection, the described 6th
Regulating valve（130）Steam inlet pass through heating steam branch pipe（5）With the tenth regulating valve（225）Steam inlet connection, it is described
Heating steam branch pipe（5）It is upper that 13rd regulating valve is housed（51）, the No.1 condenser（103）Circulating water outlet pass through circulation
Water supply branch pipe（4）With No. two condensers（203）Circulating water outlet connection, the periodical feeding branch pipe（4）It is upper to be equipped with the 12nd
Regulating valve（41）, the No.1 condenser（103）Circulating water intake pass through circulating backwater branch pipe（3）With No. two water circulating pumps
（205）Circulating water outlet connection, the circulating backwater branch pipe（3）It is upper that 11st regulating valve is housed（31）.
2. according to claim 1 improve the solidifying back of the body of taking out for thermally safe co-generation unit, it is characterised in that：The No.1
Heat supply network heat exchanger（107）With No. two heat supply network heat exchangers（206）To be connected in parallel, the No.1 heat supply network heat exchanger（107）Water side
Import and water side outlet are respectively provided with the 16th valve（65）With the 17th valve（66）, No. two heat supply network heat exchangers（206）
Water side-entrance and water side outlet be respectively provided with the 14th valve（63）With the 15th valve（64）.
3. according to claim 1 improve the solidifying back of the body of taking out for thermally safe co-generation unit, it is characterised in that：The No.1
Back pressure hydraulic pressure butterfly valve（121）For the valve of no mechanical position limitation；The No.1 takes out solidifying hydraulic pressure butterfly valve（122）Lime set pressure butterfly is taken out with No. two
Valve（221）To there is the valve of mechanical position limitation.
4. according to claim 1 improve the solidifying back of the body of taking out for thermally safe co-generation unit, it is characterised in that：The steam
Cooling device（106）For dividing wall type heat exchanger, the steam cooling device（106）Cooling water source from cogeneration units
Condensation water, low-temperature circulating water or boiler replenishing water, alternatively, softened water, demineralized water or tap water from power plant.
5. according to claim 2 improve the solidifying back of the body of taking out for thermally safe co-generation unit, it is characterised in that：Described first
Regulating valve（123）, the second regulating valve（126）, the 3rd regulating valve（127）, the 4th regulating valve（128）, the 5th regulating valve（129）、
6th regulating valve（130）, the 7th regulating valve（222）, the 8th regulating valve（223）, the 9th regulating valve（224）, the tenth regulating valve
（225）, the 11st regulating valve（31）, the 12nd regulating valve（41）, the 13rd regulating valve（51）, the 14th regulating valve（63）,
15 regulating valves（64）, the 16th regulating valve（65）With the 17th regulating valve（66）It is respectively provided with cut-off and regulatory function.
It is 6. a kind of as claim 1 to 5 any one of them improves adjusting side of the solidifying pumping back of the body for thermally safe co-generation unit
Method, it is characterised in that the adjusting method is as follows：
When No.1 cogeneration units（1）With No. two cogeneration units（2）When being supplying thermal condition：
In No. two cogeneration units（2）In, open and adjust No. two and take out solidifying hydraulic pressure butterfly valve（221）, the 9th regulating valve（224）With
Tenth regulating valve（225）, No. two Steam Turbine Through IP Admissions（201）A part of steam discharge enter No. two turbine low pressure cylinders
（202）Continue to do work, No. two Steam Turbine Through IP Admissions（201）Another part steam discharge enter No. two heat supply network heat exchangers（206）
Heating comes from heat supply network return pipe（61）Hot net water；At this time, the 7th regulating valve is opened（222）With the 8th regulating valve（223）, utilize
No. two water circulating pumps（205）Pass through No. two recirculation return pipes（213）No. two cooling towers will be come from（204）Low-temperature circulating water
It is delivered to No. two condensers（203）, be heated after low-temperature circulating water pass through No. two periodical feeding pipes again（212）It is delivered to No. two
Cooling tower（204）；
In No.1 cogeneration units（1）In, close the first regulating valve（123）With the first shut-off valve（125）, cooling steam pipe
（111）It is in off state, cooling steam system does not put into operation；At this time, standard-sized sheet No.1 back pressure hydraulic pressure butterfly valve（121）, open simultaneously
Adjust No.1 and take out solidifying hydraulic pressure butterfly valve（122）, the 5th regulating valve（129）With the 6th regulating valve（130）, press in the No.1 steam turbine
Cylinder（101）A part of steam discharge enter No.1 turbine low pressure cylinder（102）Continue to do work, the No.1 Steam Turbine Through IP Admission
（101）Another part steam discharge enter No.1 heat supply network heat exchanger（107）Heating comes from heat supply network return pipe（61）Hot net water；This
When, open the second regulating valve（126）, the 3rd regulating valve（127）With the 4th regulating valve（128）, utilize No.1 water circulating pump（105）
Pass through No.1 recirculation return pipe（114）No.1 cooling tower will be come from（104）Low-temperature circulating water be delivered to No.1 condenser
（103）, be heated after low-temperature circulating water pass through No.1 periodical feeding pipe again（113）It is delivered to No.1 cooling tower（104）；
Open and adjust the 14th regulating valve（63）With the 16th regulating valve（65）, from heat supply network return pipe（61）Hot net water it is same
When enter No.1 heat supply network heat exchanger（107）With No. two heat supply network heat exchangers（206）, open and adjust the 15th regulating valve（64）With
17 regulating valves（66）, after the hot net water output mixing after being heated, by heat supply network feed pipe（62）External heat supply；
When No.1 cogeneration units（1）For back pressure operating mode, No. two cogeneration units（2）For supplying thermal condition when：
In No. two cogeneration units（2）In, open and adjust No. two and take out solidifying hydraulic pressure butterfly valve（221）, the 9th regulating valve（224）With
Tenth regulating valve（225）, No. two Steam Turbine Through IP Admissions（201）A part of steam discharge enter No. two turbine low pressure cylinders
（202）Continue to do work, No. two Steam Turbine Through IP Admissions（201）Another part steam discharge enter No. two heat supply network heat exchangers（206）
Heating comes from heat supply network return pipe（61）Hot net water；At this time, open and adjust the 7th regulating valve（222）With the 8th regulating valve
（223）, utilize No. two water circulating pumps（205）Pass through No. two recirculation return pipes（213）No. two cooling towers will be come from（204）Low temperature
Recirculated water is delivered to No. two condensers（203）, be heated after low-temperature circulating water pass through No. two periodical feeding pipes again（212）Conveying
To No. two cooling towers（204）；
In No.1 cogeneration units（1）In, open the first regulating valve（123）With the first shut-off valve（125）, cooling steam pipe
（111）For opening, cooling steam system puts into operation；At this time, contract fully No.1 back pressure hydraulic pressure butterfly valve（121）Taken out with No.1
Solidifying hydraulic pressure butterfly valve（122）, open the 5th regulating valve（129）With the 6th regulating valve（130）, No.1 Steam Turbine Through IP Admission（101）'s
Steam discharge fully enters No.1 heat supply network heat exchanger（107）Heating comes from heat supply network return pipe（61）Hot net water；At this time, there is one small stream
The No.1 Steam Turbine Through IP Admission of amount（101）Steam discharge first pass around pressure reducing valve（124）Pressure is reduced, secondly by steam cooling dress
Put（106）Temperature is reduced, subsequently into No.1 turbine low pressure cylinder（102）Cooled down；At this time, the second regulating valve is closed
（126）, the 3rd regulating valve（127）With the 4th regulating valve（128）, No.1 water circulating pump（105）With No.1 cooling tower（104）Do not throw
Enter operation；At this time, the 11st regulating valve is opened（31）With the 12nd regulating valve（41）, from No. two cooling towers（204）Part
Low-temperature circulating water passes through circulating backwater branch pipe（3）It is delivered to No.1 condenser（103）, be heated after low-temperature circulating water pass through again
Periodical feeding branch pipe（4）It is delivered to No. two cooling towers（204）；
Open and adjust the 14th regulating valve（63）With the 16th regulating valve（65）, from heat supply network return pipe（61）Hot net water it is same
When enter No.1 heat supply network heat exchanger（107）With No. two heat supply network heat exchangers（206）, open and adjust the 15th regulating valve（64）With
17 regulating valves（66）, after the hot net water output mixing after being heated, by heat supply network feed pipe（62）External heat supply.
7. according to claim 6 improve the solidifying adjusting method taken out the back of the body and supply thermally safe co-generation unit, its feature exists
In：
When No.1 cogeneration units（1）With No. two cogeneration units（2）When being supplying thermal condition：
Close the 11st regulating valve（31）With the 12nd regulating valve（41）, No.1 cogeneration units（1）Circulation with
No. two cogeneration units（2）Circulation do not connect mutually, each self-sustaining independent operating；
Close the 13rd regulating valve（51）, No.1 heat supply network heat exchanger（107）Heating steam and No. two heat supply network heat exchangers（206）'s
Heating steam does not connect mutually, each self-sustaining independent operating；
When No.1 cogeneration units（1）For back pressure operating mode, No. two cogeneration units（2）For supplying thermal condition when：
Open the 11st regulating valve（31）With the 12nd regulating valve（41）, No.1 cogeneration units（1）No.1 cooling tower
（104）With No.1 water circulating pump（105）Do not put into operation, utilize No. two cooling towers（204）With No. two water circulating pumps（205）At the same time
For No.1 cogeneration units（1）With No. two cogeneration units（2）Low-temperature circulating water is provided, by adjusting the 8th regulating valve
（223）With the 11st regulating valve（31）Aperture, respectively adjust enter No. two condensers（203）With No.1 condenser（103）'s
Low-temperature circulating water；
At this time, No.1 Steam Turbine Through IP Admission（101）Steam discharge all for external heat supply, No.1 heat supply network heat exchanger（107）Heat is negative
Lotus is excessive and causes to reduce for thermal safety, opens and adjusts the 13rd regulating valve（51）, by No.1 Steam Turbine Through IP Admission（101）
Part steam discharge pass through heating steam branch pipe（5）It is delivered to No. two heat supply network heat exchangers（206）, utilize No. two heat supply network heat exchangers
（206）Surplus capacity, dissolves No.1 heat supply network heat exchanger（107）Excessive thermic load.
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| CN109059080A (en) * | 2018-10-18 | 2018-12-21 | 西安热工研究院有限公司 | It is a kind of can High Back Pressure Steam Turbine Units in series and parallel for the heat supply network circulation of hot-swap |
| CN109611166B (en) * | 2018-11-20 | 2023-09-05 | 华电电力科学研究院有限公司 | Condensing back-pumping heat supply system for variable working conditions of multi-low pressure cylinder steam turbine and operation method |
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| CN109611166A (en) * | 2018-11-20 | 2019-04-12 | 华电电力科学研究院有限公司 | A kind of solidifying pumping back heating system and operation method for more low pressure (LP) cylinder Variable Conditions of Steam Turbine |
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